RPi BCM2711 GPIOs
Back to RPi_Low-level_peripherals
BCM2711 GPIO functions
This page was cloned from RPi BCM2835 GPIOs, incorporating information from raspi-gpio. All is nicely hyperlinked together and cross-referenced so that clicking on a function name will automatically take you to the description of that function.
(If you want to see how GPIO-pins map back to actual pins, see this page). A selection of common circuits for interfacing with the GPIOs is given at RPi_GPIO_Interface_Circuits.
Changes from Raspberry Pi 3 are shown in italics.
GPIO Pins Alternative Function Assignment
| Bank | Pull | ALT0 | ALT1 | ALT2 | ALT3 | ALT4 | ALT5 | RPi4 signal name | RPi4 connection | |
|---|---|---|---|---|---|---|---|---|---|---|
GPIO0 |
0 | High | SDA0 | SA5 | PCLK | SPI3_CE0_N | TXD2 | SDA6 | ID_SD | J8-27 |
GPIO1 |
0 | High | SCL0 | SA4 | DE | SPI3_MISO | RXD2 | SCL6 | ID_SC | J8-28 |
GPIO2 |
0 | High | SDA1 | SA3 | LCD_VSYNC | SPI3_MOSI | CTS2 | SDA3 | SDA1 | J8-03 |
GPIO3 |
0 | High | SCL1 | SA2 | LCD_HSYNC | SPI3_SCLK | RTS2 | SCL3 | SCL1 | J8-05 |
GPIO4 |
0 | High | GPCLK0 | SA1 | DPI_D0 | SPI4_CE0_N | TXD3 | SDA3 | GPIO_GCLK | J8-07 |
GPIO5 |
0 | High | GPCLK1 | SA0 | DPI_D1 | SPI4_MISO | RXD3 | SCL3 | J8-29 | |
GPIO6 |
0 | High | GPCLK2 | SOE_N / SE | DPI_D2 | SPI4_MOSI | CTS3 | SDA4 | J8-31 | |
GPIO7 |
0 | High | SPI0_CE1_N | SWE_N / SRW_N | DPI_D3 | SPI4_SCLK | RTS3 | SCL4 | SPI_CE1_N | J8-26 |
GPIO8 |
0 | High | SPI0_CE0_N | SD0 | DPI_D4 | I2CSL CE_N | TXD4 | SDA4 | SPI_CE0_N | J8-24 |
GPIO9 |
0 | Low | SPI0_MISO | SD1 | DPI_D5 | I2CSL SDI / MISO | RXD4 | SCL4 | SPI_MISO | J8-21 |
GPIO10 |
0 | Low | SPI0_MOSI | SD2 | DPI_D6 | I2CSL SDA / MOSI | CTS4 | SDA5 | SPI_MOSI | J8-19 |
GPIO11 |
0 | Low | SPI0_SCLK | SD3 | DPI_D7 | I2CSL SCL / SCLK | RTS4 | SCL5 | SPI_SCLK | J8-23 |
GPIO12 |
0 | Low | PWM0_0 | SD4 | DPI_D8 | SPI5_CE0_N | TXD5 | SDA5 | J8-32 | |
GPIO13 |
0 | Low | PWM0_1 | SD5 | DPI_D9 | SPI5_MISO | RXD5 | SCL5 | J8-33 | |
GPIO14 |
0 | Low | TXD0 | SD6 | DPI_D10 | SPI5_MOSI | CTS5 | TXD1 | TXD1 | J8-08 |
GPIO15 |
0 | Low | RXD0 | SD7 | DPI_D11 | SPI5_SCLK | RTS5 | RXD1 | RXD1 | J8-10 |
GPIO16 |
0 | Low | FL0 (?) | SD8 | DPI_D12 | CTS0 | SPI1_CE2_N | CTS1 | J8-36 | |
GPIO17 |
0 | Low | FL1 (?) | SD9 | DPI_D13 | RTS0 | SPI1_CE1_N | RTS1 | GPIO_GEN0 | J8-11 |
GPIO18 |
0 | Low | PCM_CLK | SD10 | DPI_D14 | SPI6_CE0_N | SPI1_CE0_N | PWM0_0 | GPIO_GEN1 | J8-12 |
GPIO19 |
0 | Low | PCM_FS | SD11 | DPI_D15 | SPI6_MISO | SPI1_MISO | PWM0_1 | J8-35 | |
GPIO20 |
0 | Low | PCM_DIN | SD12 | DPI_D16 | SPI6_MOSI | SPI1_MOSI | GPCLK0 | J8-38 | |
GPIO21 |
0 | Low | PCM_DOUT | SD13 | DPI_D17 | SPI6_SCLK | SPI1_SCLK | GPCLK1 | J8-40 | |
GPIO22 |
0 | Low | SD0_CLK | SD14 | DPI_D18 | SD1_CLK | ARM_TRST | SDA6 | GPIO_GEN3 | J8-15 |
GPIO23 |
0 | Low | SD0_CMD | SD15 | DPI_D19 | SD1_CMD | ARM_RTCK | SCL6 | GPIO_GEN4 | J8-16 |
GPIO24 |
0 | Low | SD0_DAT0 | SD16 | DPI_D20 | SD1_DAT0 | ARM_TDO | SPI3_CE1_N | GPIO_GEN5 | J8-18 |
GPIO25 |
0 | Low | SD0_DAT1 | SD17 | DPI_D21 | SD1_DAT1 | ARM_TCK | SPI4_CE1_N | GPIO_GEN6 | J8-22 |
GPIO26 |
0 | Low | SD0_DAT2 | TE0 (?) | DPI_D22 | SD1_DAT2 | ARM_TDI | SPI5_CE1_N | J8-37 | |
GPIO27 |
0 | Low | SD0_DAT3 | TE1 (?) | DPI_D23 | SD1_DAT3 | ARM_TMS | SPI6_CE1_N | GPIO_GEN2 | J8-13 |
GPIO28 |
1 | - | SDA0 | SA5 | PCM_CLK | FL0 (?) | MII_A_RX_ERR | RGMII_MDIO | ||
GPIO29 |
1 | - | SCL0 | SA4 | PCM_FS | FL1 (?) | MII_A_TX_ERR | RGMII_MDC | ||
GPIO30 |
1 | Low | TE0 (?) | SA3 | PCM_DIN | CTS0 | MII_A_CRS | CTS1 | CTS0 | |
GPIO31 |
1 | Low | FL0 (?) | SA2 | PCM_DOUT | RTS0 | MII_A_COL | RTS1 | RTS0 | |
GPIO32 |
1 | Low | GPCLK0 | SA1 | RING_OCLK (?) | TXD0 | SD_CARD_PRES | TXD1 | TXD0 | |
GPIO33 |
1 | Low | FL1 (?) | SA0 | TE1 (?) | RXD0 | SD_CARD_WRPROT | RXD1 | RXD0 | |
GPIO34 |
1 | High | GPCLK0 | SOE_N / SE | TE2 (?) | SD1_CLK | SD_CARD_LED | RGMII_IRQ | SD1_CLK | |
GPIO35 |
1 | High | SPI0_CE1_N | SWE_N / SRW_N | SD1_CMD | RGMII_START_STOP | SD1_CMD | |||
GPIO36 |
1 | High | SPI0_CE0_N | SD0 | TXD0 | SD1_DAT0 | RGMII_RX_OK | MII_A_RX_ERR | SD1_DATA0 | |
GPIO37 |
1 | Low | SPI0_MISO | SD1 | RXD0 | SD1_DAT1 | RGMII_MDIO | MII_A_TX_ERR | SD1_DATA1 | |
GPIO38 |
1 | Low | SPI0_MOSI | SD2 | RTS0 | SD1_DAT2 | RGMII_MDC | MII_A_CRS | SD1_DATA2 | |
GPIO39 |
1 | Low | SPI0_SCLK | SD3 | CTS0 | SD1_DAT3 | RGMII_IRQ | MII_A_COL | SD1_DATA3 | |
GPIO40 |
1 | Low | PWM1_0 | SD4 | SD1_DAT4 | SPI2_MISO | TXD1 | PWM0_MISO | U5-3 | |
GPIO41 |
1 | Low | PWM1_1 | SD5 | TE0 (?) | SD1_DAT5 | SPI2_MOSI | RXD1 | PWM1_MOSI | U5-1 |
GPIO42 |
1 | Low | GPCLK1 | SD6 | TE1 (?) | SD1_DAT6 | SPI2_SCLK | RTS1 | ACT_CLK | |
GPIO43 |
1 | Low | GPCLK2 | SD7 | TE2 (?) | SD1_DAT7 | SPI2_CE0_N | CTS1 | ||
GPIO44 |
1 | - | GPCLK1 | SDA0 | SDA1 | TE0 (?) | SPI2_CE1_N | SD_CARD_VOLT | SDA0 | J3-14, J4-12 |
GPIO45 |
1 | - | PWM0_1 | SCL0 | SCL1 | TE1 (?) | SPI2_CE2_N | SD_CARD_PWR0 | SCL0 | J3-13, J4-11 |
GPIO46 |
2 | High | SDA0 | SDA1 | SPI0_CE0_N | <internal> | SPI2_CE1_N | RGMII_RXCLK | ||
GPIO47 |
2 | High | SCL0 | SCL1 | SPI0_MISO | <internal> | SPI2_CE0_N | RGMII_RXCTL | ||
GPIO48 |
2 | High | SD0_CLK | SPI0_MOSI | SD1_CLK | ARM_TRST | SPI2_SCLK | RGMII_RXD0 | ||
GPIO49 |
2 | High | SD0_CMD | GPCLK0 | SPI0_SCLK | SD1_CMD | ARM_RTCK | SPI2_MOSI | RGMII_RXD1 | |
GPIO50 |
2 | High | SD0_DAT0 | GPCLK1 | PCM_CLK | SD1_DAT0 | ARM_TDO | SPI2_MISO | RGMII_RXD2 | |
GPIO51 |
2 | High | SD0_DAT1 | GPCLK2 | PCM_FS | SD1_DAT1 | ARM_TCK | SD_CARD_LED | RGMII_RXD3 | |
GPIO52 |
2 | High | SD0_DAT2 | PWM0_0 | PCM_DIN | SD1_DAT2 | ARM_TDI | RGMII_TXCLK | ||
GPIO53 |
2 | High | SD0_DAT3 | PWM0_1 | PCM_DOUT | SD1_DAT3 | ARM_TMS | RGMII_TXCTL | ||
GPIO54 |
2 | RGMII_TXD0 | ||||||||
GPIO55 |
2 | RGMII_TXD1 | ||||||||
GPIO56 |
2 | RGMII_TXD2 | ||||||||
GPIO57 |
2 | RGMII_TXD3 | ||||||||
| Bank | Pull | ALT0 | ALT1 | ALT2 | ALT3 | ALT4 | ALT5 | RPi4 signal name | RPi4 connection |
Special function legend:
| Name | Function | Datasheet section | GPIOs | DeviceTree 'function' |
|---|---|---|---|---|
SDA0 |
I2C master 0 data line | I2C | GPIO0 GPIO28 GPIO44 GPIO46 | i2c0 |
SCL0 |
I2C master 0 clock line | I2C | GPIO1 GPIO29 GPIO45 GPIO47 | i2c0 |
SDA1 |
I2C master 1 data line | I2C | GPIO2 GPIO44 GPIO46 | i2c1 |
SCL1 |
I2C master 1 clock line | I2C | GPIO3 GPIO45 GPIO47 | i2c1 |
SDA3 |
I2C master 3 data line | I2C | GPIO2 GPIO4 | i2c3 |
SCL3 |
I2C master 3 clock line | I2C | GPIO3 GPIO5 | i2c3 |
SDA4 |
I2C master 4 data line | I2C | GPIO6 GPIO8 | i2c4 |
SCL4 |
I2C master 4 clock line | I2C | GPIO7 GPIO9 | i2c4 |
SDA5 |
I2C master 5 data line | I2C | GPIO10 GPIO12 | i2c5 |
SCL5 |
I2C master 5 clock line | I2C | GPIO11 GPIO13 | i2c5 |
SDA6 |
I2C master 6 data line | I2C | GPIO0 GPIO22 | i2c6 |
SCL6 |
I2C master 6 clock line | I2C | GPIO1 GPIO23 | i2c6 |
GPCLK0 |
General purpose Clock 0 | <TBD> | GPIO4 GPIO20 GPIO32 GPIO34 GPIO49 | gp_clk |
GPCLK1 |
General purpose Clock 1 | <TBD> | GPIO5 GPIO21 GPIO42 GPIO44 GPIO50 | gp_clk |
GPCLK2 |
General purpose Clock 2 | <TBD> | GPIO6 GPIO43 GPIO51 | gp_clk |
SPI0_CE0_N |
SPI0 Chip select 0 | SPI | GPIO8 GPIO36 GPIO43 GPIO46 | spi0 |
SPI0_CE1_N |
SPI0 Chip select 1 | SPI | GPIO7 GPIO35 GPIO44 | spi0 |
SPI0_CE2_N |
SPI0 Chip select 2 | SPI | GPIO45 | spi0 |
SPI0_MISO |
SPI0 MISO | SPI | GPIO9 GPIO37 GPIO40 GPIO47 | spi |
SPI0_MOSI |
SPI0 MOSI | SPI | GPIO10 GPIO38 GPIO41 GPIO48 | spi |
SPI0_SCLK |
SPI0 Serial clock | SPI | GPIO11 GPIO39 GPIO42 GPIO49 | spi |
SPI1_CE0_N |
SPI1 Chip select 0 | Auxiliary I/O | GPIO18 | spi1 |
SPI1_CE1_N |
SPI1 Chip select 1 | Auxiliary I/O | GPIO17 | spi1 |
SPI1_CE2_N |
SPI1 Chip select 2 | Auxiliary I/O | GPIO16 | spi1 |
SPI1_MISO |
SPI1 MISO | Auxiliary I/O | GPIO19 | spi1 |
SPI1_MOSI |
SPI1 MOSI | Auxiliary I/O | GPIO20 | spi1 |
SPI1_SCLK |
SPI1 Serial clock | Auxiliary I/O | GPIO21 | spi1 |
SPI2_CE0_N |
SPI2 Chip select 0 | Auxiliary I/O | GPIO47 | spi2 |
SPI2_CE1_N |
SPI2 Chip select 1 | Auxiliary I/O | GPIO46 | spi2 |
SPI2_MISO |
SPI2 MISO | Auxiliary I/O | GPIO50 | spi2 |
SPI2_MOSI |
SPI2 MOSI | Auxiliary I/O | GPIO49 | spi2 |
SPI2_SCLK |
SPI2 Serial clock | Auxiliary I/O | GPIO48 | spi2 |
SPI3_CE0_N |
SPI3 Chip select 0 | Auxiliary I/O | GPIO0 | spi3 |
SPI3_CE1_N |
SPI3 Chip select 1 | Auxiliary I/O | GPIO24 | spi3 |
SPI3_MISO |
SPI3 MISO | Auxiliary I/O | GPIO1 | spi3 |
SPI3_MOSI |
SPI3 MOSI | Auxiliary I/O | GPIO2 | spi3 |
SPI3_SCLK |
SPI3 Serial clock | Auxiliary I/O | GPIO3 | spi3 |
SPI4_CE0_N |
SPI4 Chip select 0 | Auxiliary I/O | GPIO4 | spi4 |
SPI4_CE1_N |
SPI4 Chip select 1 | Auxiliary I/O | GPIO25 | spi4 |
SPI4_MISO |
SPI4 MISO | Auxiliary I/O | GPIO5 | spi4 |
SPI4_MOSI |
SPI4 MOSI | Auxiliary I/O | GPIO6 | spi4 |
SPI4_SCLK |
SPI4 Serial clock | Auxiliary I/O | GPIO7 | spi4 |
SPI5_CE0_N |
SPI5 Chip select 0 | Auxiliary I/O | GPIO12 | spi5 |
SPI5_CE1_N |
SPI5 Chip select 1 | Auxiliary I/O | GPIO26 | spi5 |
SPI5_MISO |
SPI5 MISO | Auxiliary I/O | GPIO13 | spi5 |
SPI5_MOSI |
SPI5 MOSI | Auxiliary I/O | GPIO14 | spi5 |
SPI5_SCLK |
SPI5 Serial clock | Auxiliary I/O | GPIO15 | spi5 |
SPI6_CE0_N |
SPI6 Chip select 0 | Auxiliary I/O | GPIO18 | spi6 |
SPI6_CE1_N |
SPI6 Chip select 1 | Auxiliary I/O | GPIO27 | spi6 |
SPI6_MISO |
SPI6 MISO | Auxiliary I/O | GPIO19 | spi6 |
SPI6_MOSI |
SPI6 MOSI | Auxiliary I/O | GPIO20 | spi6 |
SPI6_SCLK |
SPI6 Serial clock | Auxiliary I/O | GPIO21 | spi6 |
PWM0_0 |
Pulse Width Modulator 0 Channel 0 | Pulse Width Modulator | GPIO12 GPIO18 GPIO52 | pwm |
PWM0_1 |
Pulse Width Modulator 0 Channel 1 | Pulse Width Modulator | GPIO13 GPIO19 GPIO45 GPIO53 | pwm |
PWM1_0 |
Pulse Width Modulator 1 Channel 0 | Pulse Width Modulator | GPIO40 | audio |
PWM1_1 |
Pulse Width Modulator 1 Channel 1 | Pulse Width Modulator | GPIO41 | audio |
TXD0 |
UART 0 Transmit Data | UART | GPIO14 GPIO32 GPIO36 | uart0 |
RXD0 |
UART 0 Receive Data | UART | GPIO15 GPIO33 GPIO37 | uart0 |
CTS0 |
UART 0 Clear To Send | UART | GPIO16 GPIO30 GPIO39 | uart0 |
RTS0 |
UART 0 Request To Send | UART | GPIO17 GPIO31 GPIO38 | uart0 |
TXD1 |
UART 1 Transmit Data | Auxiliary I/O | GPIO14 GPIO32 GPIO40 | uart1 |
RXD1 |
UART 1 Receive Data | Auxiliary I/O | GPIO15 GPIO33 GPIO41 | uart1 |
CTS1 |
UART 1 Clear To Send | Auxiliary I/O | GPIO16 GPIO30 GPIO43 | uart1 |
RTS1 |
UART 1 Request To Send | Auxiliary I/O | GPIO17 GPIO31 GPIO42 | uart1 |
TXD2 |
UART 2 Transmit Data | UART | GPIO0 | uart2 |
RXD2 |
UART 2 Receive Data | UART | GPIO1 | uart2 |
CTS2 |
UART 2 Clear To Send | UART | GPIO3 | uart2 |
RTS2 |
UART 2 Request To Send | UART | GPIO3 | uart2 |
TXD3 |
UART 3 Transmit Data | UART | GPIO4 | uart3 |
RXD3 |
UART 3 Receive Data | UART | GPIO5 | uart3 |
CTS3 |
UART 3 Clear To Send | UART | GPIO6 | uart3 |
RTS3 |
UART 3 Request To Send | UART | GPIO7 | uart3 |
TXD4 |
UART 4 Transmit Data | UART | GPIO8 | uart4 |
RXD4 |
UART 4 Receive Data | UART | GPIO9 | uart4 |
CTS4 |
UART 4 Clear To Send | UART | GPIO10 | uart4 |
RTS4 |
UART 4 Request To Send | UART | GPIO11 | uart4 |
TXD5 |
UART 5 Transmit Data | UART | GPIO12 | uart5 |
RXD5 |
UART 5 Receive Data | UART | GPIO13 | uart5 |
CTS5 |
UART 5 Clear To Send | UART | GPIO14 | uart5 |
RTS5 |
UART 5 Request To Send | UART | GPIO15 | uart5 |
PCM_CLK |
PCM clock | PCM Audio | GPIO18 GPIO28 GPIO50 | pcm |
PCM_FS |
PCM Frame Sync | PCM Audio | GPIO19 GPIO29 GPIO51 | pcm |
PCM_DIN |
PCM Data in | PCM Audio | GPIO20 GPIO30 GPIO52 | pcm |
PCM_DOUT |
PCM data out | PCM Audio | GPIO21 GPIO31 GPIO53 | pcm |
SAx |
Secondary mem Address bus | Secondary Memory Interface | many | smi |
SOE_N / SE |
Secondary mem. Controls | Secondary Memory Interface | GPIO6 GPIO34 | smi |
SWE_N / SRW_N |
Secondary mem. Controls | Secondary Memory Interface | GPIO7 GPIO35 | smi |
SDx |
Secondary mem. data bus | Secondary Memory Interface | many | smi |
I2CSL SDA / MOSI |
I2C slave Data, SPI slave MOSI | I2C/SPI slave | GPIO10 | i2c_slave |
I2CSL SCL / SCLK |
I2C slave Clock, SPI slave clock | I2C/SPI slave | GPIO11 | i2c_slave |
I2CSL SDI / MISO |
I2C slave ???, SPI slave MISO | I2C/SPI slave | GPIO9 | i2c_slave |
I2CSL CE_N |
I2C slave <not used>, SPI slave Chip Select | I2C/SPI slave | GPIO8 | i2c_slave |
ARM_TRST |
ARM JTAG reset | <TBD> | GPIO22 GPIO48 | arm_jtag |
ARM_RTCK |
ARM JTAG return clock | <TBD> | GPIO23 GPIO49 | arm_jtag |
ARM_TDO |
ARM JTAG Data out | <TBD> | GPIO24 GPIO50 | arm_jtag |
ARM_TCK |
ARM JTAG Clock | <TBD> | GPIO25 GPIO51 | arm_jtag |
ARM_TDI |
ARM JTAG Data in | <TBD> | GPIO26 GPIO52 | arm_jtag |
ARM_TMS |
ARM JTAG Mode select | <TBD> | GPIO27 GPIO53 | arm_jtag |
PCLK |
DPI Pixel Clock | Parallel Display Interface | GPIO0 | dpi |
DE |
DPI Data Enable | Parallel Display Interface | GPIO1 | dpi |
LCD_VSYNC |
DPI Vertical Sync | Parallel Display Interface | GPIO2 | dpi |
LCD_HSYNC |
DPI Horizontal Sync | Parallel Display Interface | GPIO3 | dpi |
DPI_Dx |
DPI Parallel Data | Parallel Display Interface | many | dpi |
| Name | Function | Datasheet section | GPIOs | DeviceTree 'function' |
